ELS QUIZ 6

What process occurs if there are formation and movement of magma under the earth’s crust?

• flux melting

• heat transfer

• partial melting

• decompression melting

What term should be used to describe a semi-liquid hot molten rocks located beneath the Earth?

• lava

• sand

• rocks

• magma

In what part of the earth does magmatism happen?

• Asthenosphere

• Earth’s crust

• Earth’s core

• Lithosphere

What do you call the semi-liquid hot molten rocks found on the surface of earth once the volcano erupts?

• lava

• sand

• rocks

• magma

During partial melting of magma, where does decompression melting take place?

• convergent boundary

• mid-ocean ridge

• subduction zone

• all of the above

Which of the following is NOT a factor of partial melting?

• addition of volatiles

• decrease in pressure

• an increase in pressure

• an increase in temperature

When water or carbon dioxide is added to hot rocks, the melting points of minerals within the rocks decrease. What process is being described?

• flux melting

• heat transfer

• partial melting

• decompression melting

During partial melting, which of the following minerals melt last?

• biotite

• quartz

• feldspar

• none of the above

What are the two most abundant elements in magma?

• oxygen and magnesium

• silicon and aluminum

• silicon and oxygen

• oxygen and iron

What will happen to the temperature of rocks during partial melting?

• decreases

• increases

• remains the same

• all of the above